Weather on August 23
Joliet, IL
55 Years of Data
Avg High
82°F
Avg Low
62°F
Warmest
1998
80°F avg
Coldest
2009
64°F avg
About This Date
August 23rd in Joliet, IL typically brings warm summer weather, with average highs around 82°F and lows near 62°F. Over 53 years of records, the warmest August 23rd was in 1998 (80°F average), while the coldest was 2009 (64°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 28% of August 23rd dates historically, with the wettest August 23rd recording 2.97" of rain. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for August 23rd in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 85° | 67° | 76° | — | — |
| 2024 | 76° | 53° | 64° | — | — |
| 2023 | 86° | 68° | 77° | — | — |
| 2022 | 81° | 60° | 70° | — | — |
| 2021 | 87° | 66° | 77° | — | — |
| 2020 | 84° | 61° | 72° | — | — |
| 2019 | 81° | 60° | 70° | — | — |
| 2018 | 79° | 56° | 67° | — | — |
| 2017 | 81° | 57° | 69° | — | — |
| 2016 | 77° | 57° | 67° | — | — |
| 2015 | 79° | 60° | 69° | — | — |
| 2014 | 83° | 72° | 77° | — | — |
| 2013 | 73° | 63° | 68° | 0.64" | — |
| 2012 | 84° | 58° | 71° | — | — |
| 2011 | 82° | 62° | 72° | — | — |
| 2010 | 84° | 66° | 75° | — | — |
| 2009coldest | 71° | 57° | 64° | — | — |
| 2008 | 81° | 67° | 74° | 0.08" | — |
| 2007 | 88° | 69° | 78° | 2.97" | — |
| 2006 | 83° | 62° | 72° | — | — |
| 2005 | 75° | 60° | 68° | — | — |
| 2004 | 80° | 53° | 67° | — | — |
| 2003 | 80° | 60° | 70° | — | — |
| 2002 | 85° | 70° | 77° | 0.46" | — |
| 2001 | 87° | 70° | 78° | — | — |
| 2000 | 85° | 68° | 76° | — | — |
| 1999 | 79° | 58° | 68° | — | — |
| 1998warmest | 88° | 72° | 80° | — | — |
| 1997 | 75° | 55° | 65° | — | — |
| 1996 | 89° | 70° | 79° | 0.13" | — |
| 1995 | 85° | 61° | 73° | — | — |
| 1994 | 81° | 58° | 69° | — | — |
| 1993 | 78° | 64° | 71° | 0.03" | — |
| 1992 | 82° | 59° | 71° | — | — |
| 1991 | 85° | 65° | 75° | — | — |
| 1990 | 76° | 65° | 70° | — | — |
| 1989 | 85° | 70° | 77° | 0.3" | — |
| 1988 | 77° | 65° | 71° | 0.46" | — |
| 1986 | 89° | 59° | 74° | — | — |
| 1985 | 77° | 56° | 66° | — | — |
| 1984 | 88° | 54° | 71° | — | — |
| 1983 | 85° | 65° | 75° | — | — |
| 1982 | 77° | 59° | 68° | 0.03" | — |
| 1981 | 82° | 60° | 71° | — | — |
| 1980 | 83° | 55° | 69° | — | — |
| 1979 | 83° | 65° | 74° | 0.33" | — |
| 1978 | 86° | 59° | 73° | 0.13" | — |
| 1977 | 78° | 55° | 67° | — | — |
| 1976 | 88° | 59° | 73° | — | — |
| 1974 | 85° | 64° | 74° | 1.14" | — |
| 1973 | 79° | 52° | 65° | 0.23" | — |
| 1972 | 87° | 68° | 78° | 0.48" | — |
| 1971 | 93° | 63° | 78° | 0.71" | — |
53 years of data from JOLIET